Mid-Valley Travel Agency (MVTA) has offices in 12 cities. The company believes that its monthly airline bookings are related to the mean income in those cities and has collected the following data:

a. Develop a linear regression model of monthly airline bookings as a function of income.
b. Use the process described in the chapter to evaluate your results.
c. Make the point and approximate 95 percent confidence interval estimates of monthly airline bookings for another city in which MVTA is considering opening a branch, given that income in that city is $39,020.

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Location Bookings Income 1,098 1,131 1,120 1,142 971 1,403 855 1,054 1,081 982 1,098 1,387 43,299 45,021 40,290 41,893 30,620 48,105 27,482 33,025 34,687 28,725 37,892 46,198 10 12